If you're a female you can find someone. But if you're a guy then it's over for you.
I get this.
An unattractive guy can make up for it with charisma. A guy with no charisma can make up for it with looks or with power. None of the above? The woman has a slight upper hand in the game, we have a bit more power.
As a social species, unattractive women suffer. Unless we have some kind of special charismatic qualities, men won't compete for us. The drive to compete plays a large part in our desirability. Hence the effectiveness of playing hard to get, and withholding when a man's attention is heading elsewhere. (I don't/can't play such games, but I get why they work.)
Women also compete for men. But ultimately, it's women who have the choice. That's the biological imperative. Once the desire to couple has been satisfied in two years or less, we women have to figure out how to keep the man somehow satisfied so he'll stay.
I think both sides have to dig deep sometimes to figure out what about them is desirable and play it up to attract others. Then of course, do want who we attract?
There, I've solved everything -- it's effing unsolvable. Biology and evolution screw us! In connecting with others, in believing in deities, in SI....
Ignorance really is bliss, eh? Some folks get their needs met and don't have to delve into such stuff, only to find that the answers don't yield rewards.
Enter nihilistic philosophy...
EDIT: Short version for
@lonley_roper, why I say I get it...
I once saw two birds. The female was picking food out of the grass. The male was puffed up and fluttering around her. MALE: You female! Me male! FEMALE: Busy. MALE: But I'm what you want! FEMALE: Want this food more. MALE: But no, really! Check THIS out! Look at the awesomeness I offer you! FEMALE: ....